Methods of Laying Out and Checking Work
The layout of work and the verification of correct placement, orientation, and elevation of work are also important for maintaining project output quality. Work that is not placed correctly — misplacement of anchor bolts for the foundation, for example — will lead to an extra cost for rework and delays.
In addition to checking work, the proper layout of work is also required. The required tools needed to place anchor bolts in a foundation, for example, include a tape measure, plumb bob, carpenter’ s level, and a chalk box. Topics to discuss for the proper layout and checking of work include checking elevations at the height of concrete footing during placement and finishing the grade and floor. Methods to check for proper alignment of work in the field manufactureds recommendations for the layout of certain items are windows, overhead door, and air-handling units.
Since quality control is the responsibility of everyone involved in the construction process, most of the engineers in construction positions will help to manage QC functions. Since it is not always clear what one needs to find in order to ensure a proper inspection, engineers should be instructed to watch for "key items" during inspection.
Another Example – QC for Steel Door and Frame Installation
1. When delivered to the site, each door and frame should be checked for damage.
2. Ensure proper size and gauge of doors.
3. Doors and frames must be stored off the ground somewhere in a place that protects them from the weather.
4. Do not stack doors or lay doors flat. This will cause doors to warp. Doors must be stacked on end of a carpet-covered racks or using other appropriate methods.
5. Check doors and frames for proper material, size, gauge, finish (satin, aluminum, milled), and anchorage requirements.
6. Verify door installation according to the schedule shown in contract documents.
7. Fire-rated doors or frames must be used in fire-rated wall assemblies.
8. Fire-rated doors and frames must have a label attached or a certificate stating the fire-resistance rating.
9. Check for the proper location of the hinge side of the door and for proper swing of the door. (For example, fire codes require the door swing for stairwells and other egress openings must open out, not into the stairwell.)
10. Door frames in masonry walls must be installed prior to starting masonry work (masonry must not be stepped back for future installation of door frame).
11. Is the doorframe installation straight and plumb?
12. If wood blocking is required for doorframe installation, make sure this activity is completed during the construction of the wall.
13. There is a uniform clearance between the door and doorframe (usually 1/8" or 3.2 mm).
14. Has adequate clearance been provided between the bottom of the door and the floor finish (carpet, tile) that will be installed?
15. Touch-up scratches and rust spots with approved paint primer.
16. Exterior doors must be insulated.
17. Check for weather-stripping requirements on exterior doors.
18. The intersection between the doorframe and wall should be caulked – check for missing caulking in hard – to-reach areas (for example, hinge-side of doorframe).